I found a strange looking substance on a shelf in my closet. I can’t tell if it’s mold or just dirt/grime. A picture is attached below. I wiped it down with vinegar/baking soda/detergent, and some of it went away. Thanks for the help. enter image description here

  • What was kept on that shelf? Sep 18, 2022 at 4:43
  • No clue. It’s a college dorm. Sep 18, 2022 at 4:46
  • Contact the dorm maintenance staff and ask them.
    – FreeMan
    Oct 18, 2022 at 12:02

1 Answer 1


Generally mold does not grow on what looks like a melamine surface. That looks like it just dirt or something rubbed of from whatever was on that shelf.

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